Dissociative photoionization studies of ethyl iodide using synchrotron radiation photoionization mass spectrometry and photoelectron imaging

被引：0
|
作者：
Zhang, Qihang [1 ,2 ,3 ]
Zhu, Long [4 ]
Zhou, Zhuoyan [2 ]
Wang, Zhandong [4 ]
Tian, Yuxi [1 ]
Liu, Yuzhu [2 ,3 ]
机构：
[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem MOE, Nanjing 210023, Jiangsu, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Jiangsu Key Lab Optoelect Detect Atmosphere & Ocea, Nanjing 210044, Peoples R China
[3] Nanjing Univ Informat Sci & Technol, Jiangsu Int Joint Lab Meteorol Photon & Optoelect, Nanjing 210044, Peoples R China
[4] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2023年 / 817卷
基金：
中国国家自然科学基金;
关键词：
Photoionization; VUV synchrotron radiation; Mass spectrometry; Photoelectron; Imaging spectroscopy; Ethyl iodide; IONIZATION; PHOTOCHEMISTRY; PYROLYSIS;
D O I：
10.1016/j.cplett.2023.140427
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The stepwise dissociative photoionization of ethyl iodide(C2H5I) has been investigated via synchrotron radiation photoionization mass spectrometry and photoelectron imaging spectroscopy. By using VUV synchrotron radia-tion as excitation source, the photoionization and stepwise dissociative photoionization of C2H5I were observed by tuning the photon energy from 8.5 to 14.0 eV. The ionization energy of C2H5I was measured to be 9.33 +/- 0.05 eV, and the appearance energies of C2H5+, C2H4+, C2H3+ were also determined according to the photoioni-zation efficiency spectra. The possible pathways of the stepwise dissociation of C2H5I were determined by combining the experiments with theoretical calculation based on DFT. Finally, the multi-photon ionization process of C2H5I molecule was further studied via intensity-dependent photoelectron imaging spectroscopy.
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页数：7
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